savage



. S. T. SAVAGE.

Heating Stove.

No. 21.446. Patented Sept. 7. 1858.

UNITED STATES PATENT OFFICE.

S. T. SAVAGE, OF ALBANY, NEW YORK.

STOVE.

Specification of Letters Patent No. 21,446, dated September 7, 1858.

To all whom it may concern Be it known that I, SILAS T. SAVAGE, of thecity of Albany, State of New York, have invented a new and ImprovedMethod of Constructing Stoves for the Burning of Bituminous Coal; and Ideclare the following specification, with the drawing hereto annexed aspart of the same, to be a full and perfect description of my invention.

The drawing represents a cylindrical hall or parlor stove, externally ofa form much in use at the present time, the external shell or cylinderbeing represented as having the half next the spectator and a portion ofthe hearth and the side of ash pan removed in order to show the internalstructure; but the grate with its dome is shown in perspective.

A A A A is the upper chamber, B B B B is the lower chamber, which islarger than the upper one, and at its top covered with a horizontalpartition D. The upper chamber has in its front the door E for thesupply of fuel, the two chambers being connected by the belt A B, A B,forming an intermediate chamber. Within the lower chamber is placed theopen cylinder or basket grate G the bars of which are surmounted by adome or coneshaped cover H which opens by a narrow passage J into theupper chamber. The grate stands over the ash pan C having bottom-bars(not seen in drawing) in the usual form. Betwixt the grate and the sidesof the chamber near its bottom and attached to both is a ring of metala, and lying loose upon it a. second ring 6, both rings being piercedwith similar openings 0 so arranged that when the upper ring is turnedin one position the openings will coincide, as shown in the drawing, andpass air from the ash pit, or if moved a short space the solid part ofthe upper will cover the openings in the lower ring, forming a register,the upper ring being movable by its handle 71. or any other convenientmethod.

Instead of the upper ring any convenient arrangement to open and closethe openings in the lower ring may be substituted.

I have described the grate as a cylinder basket grate, but I do notconfine myself to that form but mean any open basket grate, one that canbe used with a chamber between it and the outer shell of the stove. Theoperation of the stove is thus: The register 6 being closed the fire ismade. The supply of air passing up through the bottom bars of the gratewill soon ignite the fuel. As soon as the coal is well ignited and burnsfreely the register Z) is opened gradually when the air from the ashpit, partially heated by the radiant caloric, passes up into the chamberB B around the burning coal; and over the upper surface of the fire, (asshown by the direction of the arrows,) where it meets and is broughtinto contact with the flame and smoke, supplying fresh oxygen to theproducts of combustion, consuming nearly all the fuliginous matterpassing over from the bitumen, &c., of the coal. This current of air,its quantity being regu lated by the register 71., checks the rush ofair through the bottom bars, and thus controls the rate of combustion ofthe fuel. Further the dome being heated by the fire, warms the air whichpasses into the grates, above the burning fuel, making it more efiicientfor the consumption of the products of combustion.

I claim The combination of an open cylindrical or basket grate, with adome or a cone shaped cover: placed within an outer chamber having aregister for the admission and regulation of a current of air betweenthe grate and the walls of said chamber, arranged near the bottom of thechamber, substantially as the same is described, and for the purposesset forth in the within specification.

S. T. SAVAGE.

IVitnesses E. J. MILLER, RroHD. VARIEK DEIVITT.

